| Issue |
136518
|
| Summary |
placement new
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
ordinary-github-user
|
https://godbolt.org/z/qo1nKq4qb
`-std=c++26 -O3 -Wall -mavx512bw -mbmi -fno-exceptions`
```c++
#include <memory>
#include <cstdint>
#include <utility>
template<class T, std::size_t N>
struct StaticVector
{
union { T m_data[N]; };
std::uint8_t m_size;
constexpr StaticVector(auto&&...args)noexcept :m_size{ sizeof...(args) }
{
std::construct_at(&m_data);
}
constexpr void push_back(const T x)noexcept
{
new(m_data+m_size)T{x};
}
};
static_assert([]
{
StaticVector<std::uint8_t, 2> vec{1};
vec.push_back(1);
return true;
}());
```
```
free(): invalid next size (fast)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++26 -O3 -Wall -mavx512bw -mbmi -fno-exceptions <source>
1. <eof> parser at end of file
#0 0x0000000003be2778 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3be2778)
#1 0x0000000003be08bc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3be08bc)
#2 0x0000000003b311c8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000796790242520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007967902969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000796790242476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007967902287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000796790289676 (/lib/x86_64-linux-gnu/libc.so.6+0x89676)
#8 0x00007967902a0cfc (/lib/x86_64-linux-gnu/libc.so.6+0xa0cfc)
#9 0x00007967902a2a9d (/lib/x86_64-linux-gnu/libc.so.6+0xa2a9d)
#10 0x00007967902a5453 __libc_free (/lib/x86_64-linux-gnu/libc.so.6+0xa5453)
#11 0x0000000006d90ecb clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6d90ecb)
#12 0x00000000062ee589 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#13 0x00000000062eed1d clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x62eed1d)
#14 0x0000000006153cb3 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6153cb3)
#15 0x000000000614207a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x614207a)
#16 0x000000000451cebd clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x451cebd)
#17 0x000000000482b4fa clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x482b4fa)
#18 0x00000000047a7c4b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x47a7c4b)
#19 0x000000000491b313 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x491b313)
#20 0x0000000000db1451 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb1451)
#21 0x0000000000da9bad ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#22 0x000000000458e8f9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#23 0x0000000003b315e3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3b315e3)
#24 0x000000000458eb19 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#25 0x00000000045520cd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45520cd)
#26 0x0000000004553091 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4553091)
#27 0x000000000455d3dc clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x455d3dc)
#28 0x0000000000dae181 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdae181)
#29 0x0000000000c2fec4 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc2fec4)
#30 0x0000796790229d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#31 0x0000796790229e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#32 0x0000000000da9645 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xda9645)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
